The National Transportation Safety Board (NTSB) on Tuesday issued two “urgent” safety recommendations after discovering thousands of close calls between helicopters and planes near Ronald Reagan Washington National Airport following a midair collision in January.

A medical transport helicopter crashed Monday in Mississippi, while carrying two hospital workers and a pilot, officials said.

Three people aboard a medical helicopter were killed when the aircraft crashed in rural Mississippi, officials said.

An American Airlines passenger jet and an Army helicopter collided on Jan. 29 as the plane prepared to land at Washington, D.C.’s Ronald Reagan National Airport.

Transportation Secretary Sean Duffy said the National Transportation Safety Board’s recommendations will be accepted.

The National Transportation Safety Board released new information on what happened before a helicopter crash killed two people last month in Kinney County.